The ACPI's lid device "LID0" is not listed in /proc/acpi/wakeup, and it can be the result of missing "_PRW" object in ACPI BIOS. It has only _HID, _LID and _DSW objects such as below (extracted from acpidump.txt).
Device (LID0) { Name (_HID, EisaId ("PNP0C0D") Method (_LID, 0, NotSerialized) { // skipped } Method (_DSW, 3, NotSerialized) { // skipped } } According to ACPI spec, _PRW is required for wake such as below 7.3.13 _PRW (Power Resources for Wake) This object evaluates to a list of power resources upon which this device depends for wake. It also contains additional information needed for wake, including wake events and sleep or soft-off state information. _PRW is only required for devices that have the ability to wake the system from a system sleeping state. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1898949 Title: ThinkBook 14-IIL can't wake from sleep by opening lid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1898949/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs